____ happened to be no one in the building when the fire broke out.A.It B.This c.There D.That 为什么不能选其他三个选项呢

he ____ by his sister at that moment.A.happened to see B.was happened to see C.was happened to be seen D.happened to be seen the old man happened to be on I happened ____ when you came to my home last nightA.am out B.to out C.to be out D.be out There ( )nobody in the room.were just happened being were happened happened to be. Peter was happened to be at home that day.为什么是was happened而不是happened What ____ you yesterday A happen B happen to C happened to D was happened to It happened to be 和There happened to be有什么区别? --What _ to them?--they appeared__in the accident.A.has happened to,be injured B.happened ,to have been injuredC.has happened to ,be injured D.happened ,injured I happened ____ the street when I heard my name called.A.to crossB.having crossedC.to be crossingD.crossing为啥选C? 高二选择题一道There____ nobody in the parking place when he needed help A happened to be B happened to have C happened D happened to 一到英语适当形式填空题when the earthquake happened on may 12th,water and food ____(be)______(send) to wenchuan by plane and track. He — by his sister at that moment.A. happened to see B. was happeded to see C. was happened to be seen D. happened to be seen 翻译:I happened to be at the station ,when it happened What happened to you 同义句 What ____ ____ to you? There happened to be no one in your office when I phoneThere happened to be怎么回事啊` 去掉怎么样 Happened to /happened with 区别 What happened to her just now?同义句 ___ ____ ____ ____her just now? What ____ the forest in China in the last 10 years?A.has happened to B.was happened C.has been happened to请问为什么,